US5417374A - System and method for pressure treatment of granular material - Google Patents

System and method for pressure treatment of granular material Download PDF

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Publication number
US5417374A
US5417374A US08/111,105 US11110593A US5417374A US 5417374 A US5417374 A US 5417374A US 11110593 A US11110593 A US 11110593A US 5417374 A US5417374 A US 5417374A
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US
United States
Prior art keywords
nip
high pressure
air
accordance
crushing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US08/111,105
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English (en)
Inventor
Peter Kranz
Franz Goeddecke
Kunibert Laufs
Werner Ewald
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Kloeckner Humboldt Deutz AG
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Kloeckner Humboldt Deutz AG
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Application filed by Kloeckner Humboldt Deutz AG filed Critical Kloeckner Humboldt Deutz AG
Assigned to KLOECKNER-HUMBOLDT DEUTZ AG reassignment KLOECKNER-HUMBOLDT DEUTZ AG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: EWALD, WERNER, LAUFS, KUNIBERT, GOEDDECKE, FRANZ, KRANZ, PETER
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C4/00—Crushing or disintegrating by roller mills
    • B02C4/28—Details
    • B02C4/286—Feeding devices
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S241/00—Solid material comminution or disintegration
    • Y10S241/14—Grinding in inert, controlled atmosphere

Definitions

  • the invention relates to improvements in a two roller interparticle crushing high pressure roller press and the method of operating for the pressure treatment of granular material.
  • the pulverulent material supplied to the nip is crushed by the high pressures and crushing occurs between the particles of material forming incipient cracks within the material so that the material particles can be effectively further disintegrated with minimum energy.
  • the advantage of the interparticle crushing is uniform improved crushing with a substantial reduced outlay of power required.
  • the pulverulent bulk material is supplied to the nip and seized by the oppositely driven rollers and drawn into the nip by friction. This is a friction between the bulk material particles itself and friction between the bulk material and roller surface.
  • the individual particles of the bulk material that are drawn in are mutually crushed in a product bed with the material compressed between the two roller surfaces with an extremely high pressure which has been known to the art as interparticle crushing and which is disclosed in the aforementioned U.S. and German patents.
  • the products of this pressure treatment are agglomerates or scabs of comminuted bulk material that can be subsequently disintegrated with a minimum of mechanical power outlay.
  • the air that was originally present in the pulverulent bulk material is expressed from the product bed. It escapes through the material column formed by the bulk material being fed into the nip. As a result of the air escapement, the bulk material is loosened in the draw-in region between the rollers, particularly when the fine grained bulk materials are pressed. The result is that the material draw-in is deteriorated and the escape of air has an adverse effect in the draw-in. As a result, the throughput and the degree of comminution in the nip are lowered.
  • German Published Application 38 06 398 This proposed that the product delivery stack be subdivided and the coarse material and fine material be separately supplied to the nip. By this arrangement, the coarse bulk material is kept so low that the air expressed therefrom can easily escape through the low and coarse pored bulk material.
  • a disadvantage in this disclosed method is that it can only be employed when the coarse material and the fine material are separated from one another before the pressure treatment. Further, the possibility of the formation of a nonuniform product bed cannot be precluded or occurs due to the separate delivery of coarse material and fine material.
  • a further disadvantage of known two roller machines is that high wall friction resistances impede the replenishment of the bulk material in the nip due to the lateral pressure of the bulk material supported at the bottom of the roller surfaces against the inside wall of the product delivery stack. This is especially true when the filling level in the product delivery stack is extremely high.
  • a further object of the invention is to provide an improved two roller interparticle crushing press and method of operating wherein a substantially improved nip draw-in of the material occurs.
  • a still further object of the invention is to provide an improved two roller high pressure interparticle crushing press with a unique arrangement for improving the escape of air between particles as the particles are fed into the nip.
  • the invention contemplates broadening of the lower part of the product delivery stack axially over the entire roller length.
  • the bulk material is handled so that it can form an exposed slope or exposed area of material for the escape of air.
  • This broadened area accommodates a free flow of material with control of the slope angle and a clearance is formed between this slope and the walls of the product delivery stack.
  • the escape of air from the material is accommodated.
  • the exposed area is controlled by controllable flaps in the lower part of the product delivery stack which makes it possible to vary the height of the slope being formed during operation of the machine and thus compensate for changes in the type of bulk material received and such changes have an influence on the in-flow of bulk material to the nip.
  • the air emerging from the exposed slope of bulk material can be received and handled by dust removal means.
  • a vacuum or reduced atmospheric pressure can be applied to the material passing into the nip such as by forming a chamber above the exposed area and pumping out the removed air whereby the removed air can be handled by the dust removal means.
  • the air which exits from the bulk material will be promoted by the reduced pressure above the exposed surface.
  • FIG. 1 is a somewhat schematic showing, partially in section, of a product delivery stack feeding material to a two roller press and constructed and operating in accordance with the principles of the present invention
  • FIG. 2 is an end elevation schematic showing, partially in section, of a modified form of the two roller press with the product stack;
  • FIG. 3 is another end elevational view shown in schematic form with portions in section.
  • a product delivery stack 12 is located above parallel horizontal rollers of a two roller interparticle crushing mechanism.
  • the product delivery stack 12 receives pulverulent stock material from the source and feeds it down into a nip 15 between the rollers 10 and 11.
  • the product delivery stack 12 is formed between opposed walls and a wall 14 has a lower wall portion 13 which is offset laterally in a direction away from the nip to form an exposed sloping surface 16. Air being expressed from the material passes upwardly through this exposed surface as indicated by the arrowed line 17 and the lower wall portion 13 with an upper wall forms a chamber into which the air flows.
  • the lower wall portion 13 broadens the product delivery stack above the nip so that the resultant stack at the nip is centrally located above the nip 15.
  • the bulk material at one side of the nip forms the sloping surface 16 through which the air 17 escapes into the chamber above the surface.
  • a section line 18 is connected to the chamber and this leads to a dust removal means (not shown).
  • the height of the slope 16 above the nip is controlled by a vertically movable flap 19.
  • This flap or slide 19 has means for adjustably controlling its height as indicated by the double arrowed lines. Raising or lowering the flap 19 will change the height of the surface 16 and this can be matched to the different draw-in behaviors of various bulk materials that are fed.
  • two opposed surfaces are provided. This is accomplished by providing lower wall portions 13 and 13' which are laterally offset from the walls 14 and 14' of the product delivery stack 12.
  • the lower wall portions 13 and 13' are situated so that they are laterally offset an equal distance from the nip 15 to center the resultant feed-in stack to the nip 15.
  • the walls 13 and 13' provide exposed sloping surfaces 16 and 16'. Air expressed from the material flows upwardly as indicated by the arrowed lines 17 and 17'.
  • Slides or flaps 19 and 19' are arranged to be vertically adjustable as indicated by the double arrowed lines.
  • FIG. 3 a further arrangement is shown to control the formation of the exposed surface sloping area which accommodates the escape of air.
  • the stack 12 is offset laterally and a lower wall portion 13 is laterally offset from the stack so that the feed into the nip from both sides is uniform. That is, above the nip, the wall 14' and the wall 13 are laterally offset an equal distance from the nip 15.
  • two pivotally mounted flaps 20 and 20' are arranged pivoted at their upper edge and pivotally adjustable as indicated by the double arrowed lines to control the slope and height of an exposed surface 21 and 21' of material.
  • the adjustable position of the flaps 20 and 20' are shown by the solid line positions and dotted line positions illustrated in FIG. 3.
  • Adjustment means are indicated schematically by the lines 22 and 22'. Adjustment of the pivotal flaps accomplishes a finely matched regulating element for the optimum adaptation of the draw-in behavior of the bulk material. Since each of the flaps 20 and 20' is individually adjustable, the slopes 21 and 21' can be individually adjusted so that the expression and escape of air can be controlled.
  • a line 18 is again provided for generating subatmospheric air above the surface of the material.
  • a chamber 17'" is formed above a surface 16.
  • Chambers 17 and 17' are formed by the outer walls on the flaps 20 and 20'. These chambers 17 and 17' may also be connected to a line for the formation of subatmospheric air above the surfaces 21 and 21' and the air drawn off can be passed to a dust removal mechanism.
  • the draw-in behavior and escapement of air can be regulated during operation for improved pressing and draw-in capabilities of the press.
  • FIGS. 1, 2 and 3 can be combined.
  • the product delivery stack of FIG. 2 can be provided with pivotal flaps such as shown in FIG. 3.
  • the arrangement of FIG. 3 can be provided with flaps which reciprocate.
  • the lower stack that is the material immediately above the nip be balanced on both sides of the rolls for improved draw-in.
  • the upper stack 12 can be centrally located and in the arrangement of FIGS. 1 and 3, the upper stacks 12 are laterally offset while the lower portion of the walls are situated so as to center the lower stack with respect to the nip 15.
  • the interparticle crushing high pressure press can be employed for pressure comminution of granular material and the features can also be utilized for compressing materials such as potassium or rock salts.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
  • Food Preservation Except Freezing, Refrigeration, And Drying (AREA)
  • Combined Means For Separation Of Solids (AREA)
  • Paper (AREA)
  • Crushing And Grinding (AREA)
  • Fertilizers (AREA)
  • General Preparation And Processing Of Foods (AREA)
US08/111,105 1992-08-24 1993-08-24 System and method for pressure treatment of granular material Expired - Fee Related US5417374A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4228058.3 1992-08-24
DE4228058A DE4228058C2 (de) 1992-08-24 1992-08-24 Anlage und Verfahren zur Druckbehandlung körnigen Gutes

Publications (1)

Publication Number Publication Date
US5417374A true US5417374A (en) 1995-05-23

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US08/111,105 Expired - Fee Related US5417374A (en) 1992-08-24 1993-08-24 System and method for pressure treatment of granular material

Country Status (5)

Country Link
US (1) US5417374A (it)
EP (1) EP0584579B1 (it)
AT (1) ATE148839T1 (it)
DE (2) DE4228058C2 (it)
DK (1) DK0584579T3 (it)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100078511A1 (en) * 2008-09-29 2010-04-01 Robert Muller Star feeder with comminuting insert
US20100206974A1 (en) * 2007-07-10 2010-08-19 Flsmidth A/S Roller press with adjustable plates
US20110114772A1 (en) * 2008-07-09 2011-05-19 Khd Humboldt Wedag Gmbh Feed device with two rotary valves which are variable independently of each other
US20120018555A1 (en) * 2009-02-17 2012-01-26 Lindner-Recyclingtech Gmbh Shredding Device
CN103212464A (zh) * 2013-03-28 2013-07-24 成都利君实业股份有限公司 一种辊压机侧挡板机构
CN103406170A (zh) * 2013-08-31 2013-11-27 杜文俊 一种单传动辊压机
US8695907B2 (en) 2012-04-20 2014-04-15 Metso Minerals Industries, Inc. Roller crusher with cheek plates
US8708265B2 (en) 2012-04-20 2014-04-29 Metso Minerals Industries, Inc. Roller crusher with balancing cylinders
US20140252141A1 (en) * 2011-06-30 2014-09-11 Bühler AG Method and Device for Producing Flour and/or Semolina
EP2731722A4 (en) * 2011-07-14 2015-03-04 Univ Melbourne IMPROVEMENTS IN THE COMBINATION OF A MATERIAL AND / OR THE REMOVAL OF LIQUID FROM A MATERIAL
US20150174582A1 (en) * 2012-05-23 2015-06-25 Sandvik Intellectual Property Ab Vertical shaft impact crusher feed tube
CN113499816A (zh) * 2021-06-02 2021-10-15 十条印刷器材科技(平湖)有限公司 油墨研磨装置
US20220134348A1 (en) * 2020-10-29 2022-05-05 Seiko Epson Corporation Coarse crusher
US11446676B2 (en) * 2017-08-23 2022-09-20 Untha Shredding Technology Gmbh Shredder device for shredding material

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10233811B4 (de) * 2002-07-25 2013-05-29 Khd Humboldt Wedag Gmbh Zweiwalzenmaschine zur Druckbehandlung körnigen Gutes
DE102013018325B4 (de) * 2013-10-31 2019-03-21 Khd Humboldt Wedag Gmbh Hochdruckwalzenpresse mit Mahlgutentlüftung und Verfahren zur Vermeidung von Vibrationen bei der Aufgabe von Mahlgut
DE102017115856A1 (de) * 2017-07-14 2019-01-17 Maschinenfabrik Köppern Gmbh & Co. Kg Walzenpresse und Verfahren zur Bestimmung des Füllstandes
CN107754999A (zh) * 2017-11-10 2018-03-06 江苏南方光纤科技有限公司 裸光纤粉碎装置及裸光纤自动回收系统
RU2725195C1 (ru) * 2019-12-24 2020-06-30 Федеральное государственное бюджетное образовательное учреждение высшего образования "Воронежский государственный лесотехнический университет имени Г.Ф. Морозова" Устройство для подачи сыпучего материала
RU2743029C1 (ru) * 2020-08-10 2021-02-12 Федеральное государственное бюджетное образовательное учреждение высшего образования "Воронежский государственный лесотехнический университет имени Г.Ф. Морозова" Устройство для подачи сыпучего материала
RU2749367C1 (ru) * 2020-12-01 2021-06-09 Федеральное государственное бюджетное образовательное учреждение высшего образования "Воронежский государственный лесотехнический университет имени Г.Ф. Морозова" Устройство для подачи сыпучего материала

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FR556960A (fr) * 1922-06-30 1923-08-01 Fiat Spa Perfectionnements aux capotes pour torpédos
US2442740A (en) * 1942-12-24 1948-06-01 Melvin S Groh Opposed roll crusher with feed means
CH361463A (de) * 1956-08-23 1962-04-15 Buehler Ag Geb Walzenstuhlsteuerung
DE2708053A1 (de) * 1977-02-24 1978-09-07 Klaus Prof Dr Ing Schoenert Verfahren zur fein- und feinstzerkleinerung von materialien sproeden stoffverhaltens
US4703897A (en) * 1983-01-24 1987-11-03 Klockner-Humboldt-Deutz Aktiengesellschaft Method and apparatus for continuous pressure comminution of brittle grinding stock
GB2135211A (en) * 1983-02-17 1984-08-30 Kloeckner Humboldt Deutz Ag Method of and apparatus for continuous comminution of brittle material
US4592512A (en) * 1983-04-19 1986-06-03 Klockner-Humboldt-Deutz Ag Method and apparatus for the common grinding of two or more brittle materials having different grinding properties
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Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100206974A1 (en) * 2007-07-10 2010-08-19 Flsmidth A/S Roller press with adjustable plates
US20110114772A1 (en) * 2008-07-09 2011-05-19 Khd Humboldt Wedag Gmbh Feed device with two rotary valves which are variable independently of each other
US8439288B2 (en) * 2008-07-09 2013-05-14 Khd Humboldt Wedag Gmbh Feed device with two rotary valves which are variable independently of each other
US8240588B2 (en) * 2008-09-29 2012-08-14 Zeppelin Systems Gmbh Star feeder with comminuting insert
US20100078511A1 (en) * 2008-09-29 2010-04-01 Robert Muller Star feeder with comminuting insert
CN101712407B (zh) * 2008-09-29 2013-11-13 泽普林料仓和系统有限责任公司 带内置粉碎器的星形给料器
US8733682B2 (en) * 2009-02-17 2014-05-27 Lindner-Recyclingtech Gmbh Shredding device
US20120018555A1 (en) * 2009-02-17 2012-01-26 Lindner-Recyclingtech Gmbh Shredding Device
US10099222B2 (en) * 2011-06-30 2018-10-16 Bühler AG Method and device for producing flour and/or semolina
US10933423B2 (en) 2011-06-30 2021-03-02 Bühler AG Method and device for producing flour and/or semolina
US20140252141A1 (en) * 2011-06-30 2014-09-11 Bühler AG Method and Device for Producing Flour and/or Semolina
EP2731722A4 (en) * 2011-07-14 2015-03-04 Univ Melbourne IMPROVEMENTS IN THE COMBINATION OF A MATERIAL AND / OR THE REMOVAL OF LIQUID FROM A MATERIAL
US8708265B2 (en) 2012-04-20 2014-04-29 Metso Minerals Industries, Inc. Roller crusher with balancing cylinders
US8695907B2 (en) 2012-04-20 2014-04-15 Metso Minerals Industries, Inc. Roller crusher with cheek plates
US20150174582A1 (en) * 2012-05-23 2015-06-25 Sandvik Intellectual Property Ab Vertical shaft impact crusher feed tube
US9550187B2 (en) * 2012-05-23 2017-01-24 Sandvik Intellectual Property Ab Vertical shaft impact crusher feed tube
CN103212464B (zh) * 2013-03-28 2015-01-07 成都利君实业股份有限公司 一种辊压机侧挡板机构
CN103212464A (zh) * 2013-03-28 2013-07-24 成都利君实业股份有限公司 一种辊压机侧挡板机构
CN103406170B (zh) * 2013-08-31 2015-08-05 杜文俊 一种单传动辊压机
CN103406170A (zh) * 2013-08-31 2013-11-27 杜文俊 一种单传动辊压机
US11446676B2 (en) * 2017-08-23 2022-09-20 Untha Shredding Technology Gmbh Shredder device for shredding material
US20220134348A1 (en) * 2020-10-29 2022-05-05 Seiko Epson Corporation Coarse crusher
US11878306B2 (en) * 2020-10-29 2024-01-23 Seiko Epson Corporation Coarse crusher
CN113499816A (zh) * 2021-06-02 2021-10-15 十条印刷器材科技(平湖)有限公司 油墨研磨装置

Also Published As

Publication number Publication date
EP0584579A2 (de) 1994-03-02
DE59305436D1 (de) 1997-03-27
EP0584579B1 (de) 1997-02-12
DE4228058C2 (de) 1995-04-20
DK0584579T3 (da) 1997-08-18
ATE148839T1 (de) 1997-02-15
DE4228058A1 (de) 1994-03-03
EP0584579A3 (it) 1994-04-27

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